>POSSIBLE EXPLANATIONS (of abnormal EEGs among vegans):
> 2. Undefined deficiency: possible, but if this were so, it would be
>expected that a minimal cerebral deficit might be reflected in raised
>neuroticism scores, which was not found.

I would guess that the level of lipids intake would be least in vegans.
Lipids affect the nervous tissue.
ergo, the EEG would be more out of kilter, since it surely  must depend on
good nerve transmission.
Of course, it could be related to proteins?

Lynton